The list-extras package

Since Data.List.Extras is prime realestate for
extensions to Data.List, if you have something
you'd like to contribute feel free to contact the
maintainer (I'm friendly). I'm amenable to adopting
code if you think your functions aren't enough for
a package on their own. Or if you would rather
maintain a separate package I can share the
Data.List.Extras.Foo namespace.